Incandescent lamp.



A. I. THOMPSON.

INGANDESGENT LAMP.

APPLICATION FILED APR.1B, 1911.

Patented Apr. 23, 1912.

COLUMBIA PLASOGRAPH CO.,WA$H|NOTON, D. c.

UNTED STATES PATENT FTQE,

AUGUSTUS F. THOMPSON, 0F HUNTINGTON, WEST VIRGINIA.

INGANDESOENT LAMP.

To all whom it may concern:

Be it known that I, AUGUSTUS F. THOMP- SON, a citizen of the United States, residing at Huntington, in the county of Cabell and State of West Virginia, have invented new and useful Improvements in Incandescent Lamps, of which the following is a specification.

The invention relates to lamps, and more particularly to the class of incandescent gas lamps or burners.

The primary object of the invention is the provision of a lamp of this character in which the light-distributing mantle or manties are disposed beneath a fluid mixing chamber communicating with the lamp, the heat from the mantle or mantles being directed toward the mixing chamber for heating the contents thereof when circulating therethrough, thus assuring the proper heating of the combustible mixture, whereby it will more readily ignite and enable a con stant and regular flame to be maintained without variation or flickering that would otherwise result from variations in the pressure of the fluid delivered to the lamp.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claim hereunto appended.

In the drawings: Figure 1 is a vertical sectional view of a lamp embodying a device constructed in accordance with the invention. Fig. 2 is a fragmentary section on the line 2-2 of Fig. 1. Fig. 3 is a vertical sectional view through the mixing chamber and the burners.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings by numerals, 5 designates a supply or system pipe for coal gas, or other hydrocarbon fluid, with which it is desired to connect the lamp constructed in accordance with the invention, and as will be hereinafter more fully described. This lamp comprises a mixing chamber 6 which may be of any desirable size and shape. In this instance, the same is shown cylindrical in shape, the latter being provided at its top, centrally thereof, with which connects,

a vertical nipple 7, in any suitable manner, to

Specification of- Letters Patent.

Application filed April 18, 1911.

Serial No. 621,815.

the supply or system pipe 5, and this nipple 7 is formed with a suitable air regulator, so as to permit the proper inflow of air into the mixing chamber 6 of the lamp.

Suit-ably mounted in the bottom of the mixing chamber 6 are tubular arms 8, the same corresponding in number to the re quired number of burners. Each tubular arm 8 is extended at one end into the mixing chamber 6 the required distance, while its opposite end projects outwardly below the bottom of the said mixing chamber the required distance. Suitably fixed to the tubular arms 8, directly beneath the bottom of the mixing chamber 6, are mantle holders or brackets 9, supporting the usual inverted mantles 10, which are supplied with the combustible mixture from the mixing chamber 6 supplied from the supply or system pipe 5 of the lamp, the mantles 10 being ignited in the ordinary well-known manner.

Fixed to the bottom of the mixing chamber 6 and deflected at an angle over the inner end of the tubular arms 8 are baifle plates 11 which serve to spread the combustible mixtures discharging through the tubular arms 8 into the mantles. When the mantles have been ignited, the heat therefrom will be directed upwardly to the mixing chamber 6. Thus the latter will become thoroughly heated for the proper heating and mixing of the fuel and air circulating within the said mixing chamber prior to its delivery to the mantles 10, so that said combustible mixture will become heated to a very high degree before being thrown into the mantles for consumption. Thus by reason of the heating of the combustible mixture within the mixing chamber 6, prior to its consumption or ignition in the mantles 10, a constant and regular flame will be maintained without variation or flickering, should variations of pressure of the fluid occur in the supply or system pipe connected with the burner or lamp.

WVhat is claimed is:

A lamp comprising a mixing chamber, a tubular arm mounted in the bottom of said chamber and having one end extending interiorly thereof and its opposite end depend ing exteriorly thereof, means carried by said exterior end for supporting a burner, a central supply pipe communicating with said mixing chamber and the top thereof, means Patented'Apr. 2a, 1912.

In testimony whereof I affix my signature 1n presence of two wltnesses.

AUGUSTUS F. THOMPSON.

in said pipe for regulating the flow of air into said chamber, and a baffle plate fixed to the bottom of said chamber and extending diagonally over the inner end of the tubular arm for spreading the combustible mixture Vitnesses: entering said tubular arm from the com- JOHN F. ELLIS, municatlng chamber. WV. J. WVOLFE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

